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-rw-r--r--synapse/config/logger.py6
-rw-r--r--synapse/config/tls.py6
2 files changed, 11 insertions, 1 deletions
diff --git a/synapse/config/logger.py b/synapse/config/logger.py
index 2dbeafa9dd..a1d6e4d4f7 100644
--- a/synapse/config/logger.py
+++ b/synapse/config/logger.py
@@ -148,8 +148,8 @@ def setup_logging(config, use_worker_options=False):
         "%(asctime)s - %(name)s - %(lineno)d - %(levelname)s - %(request)s"
         " - %(message)s"
     )
-    if log_config is None:
 
+    if log_config is None:
         level = logging.INFO
         level_for_storage = logging.INFO
         if config.verbosity:
@@ -176,6 +176,10 @@ def setup_logging(config, use_worker_options=False):
                 logger.info("Opened new log file due to SIGHUP")
         else:
             handler = logging.StreamHandler()
+
+            def sighup(signum, stack):
+                pass
+
         handler.setFormatter(formatter)
 
         handler.addFilter(LoggingContextFilter(request=""))
diff --git a/synapse/config/tls.py b/synapse/config/tls.py
index 247f18f454..4748f71c2f 100644
--- a/synapse/config/tls.py
+++ b/synapse/config/tls.py
@@ -109,6 +109,12 @@ class TlsConfig(Config):
         # key. It may be necessary to publish the fingerprints of a new
         # certificate and wait until the "valid_until_ts" of the previous key
         # responses have passed before deploying it.
+        #
+        # You can calculate a fingerprint from a given TLS listener via:
+        # openssl s_client -connect $host:$port < /dev/null 2> /dev/null |
+        #   openssl x509 -outform DER | openssl sha256 -binary | base64 | tr -d '='
+        # or by checking matrix.org/federationtester/api/report?server_name=$host
+        #
         tls_fingerprints: []
         # tls_fingerprints: [{"sha256": "<base64_encoded_sha256_fingerprint>"}]
         """ % locals()